Contents

Overclocking configuration

WARNING: Setting any (of the below) parameters which could potentially over-volt your Raspberry Pi, will set a permanent bit within the SOC, voiding your warranty. So if you care about the warranty on your Raspberry Pi do NOT adjust any voltages!

Also at your own risk, you can try the display overscan settings from our wiki. These overscan-settings were posted on the forum, but are not confimed to work...

Overclocking options

These settings are also documented in one of the example configuration files mentioned on the config page.

Option

Description

arm_freq

frequency of ARM in MHz. Default 700.

gpu_freq

Sets core_freq, h264_freq, isp_freq, v3d_freq together.

core_freq

frequency of GPU processor core in MHz. It have an impact on ARM performance since it drives L2 cache. Default 250.

GPU core, h264, v3d and isp should all be integer divisors of pll_freq.
So core_freq=480 sets pll_freq=960. That would allow a v3d_freq/h264_freq/v3d_freq of 320 with an integer divider of 3.

Tested values

The following table shows some successfull attempts of overclocking. These settings may not work on every device and can shorten the life of the Broadcom SoC. Warranty will be voided if overvoltage is used.

arm_freq

gpu_freq

core_freq

h264_freq

isp_freq

v3d_freq

sdram_freq

over_voltage

over_voltage_sdram

750

255

450

900

250

500

900

275

500

900

450

450

930

350

500

1000

500

450

6

1000

500

500

6

References

↑ 1.01.11.21.3What this means is that you can specify -16 and expect about 0.8V as the GPU/core voltage. This is 0.4V below the normal value of 1.2. If you specify 16, you'd get 0.4V ABOVE the normal value of 1.2V, or 1.6V. The fact that someone carefully specified "8" and "1.4V" as the upper limit in the examples leads me to think that it is likely to shorten the life of your raspberry pi significantly if you would specify values above "8". So: don't specify values above zero, but if you do, don't go above 8.